List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• ox-palate nerite (Nerita albicilla), blotched nerite

usually written using kana alone  noun  noun (generic) 

• Arca avellana (species of ark shell)

usually written using kana alone  noun  noun (generic) 

• Margaritifera laevis (species of freshwater pearl mussel)

usually written using kana alone  noun  noun (generic) 

• Burchard's cockle (Vasticardium burchardi)

usually written using kana alone  noun  noun (generic) 

• Lunella coreensis (species of turban shell)

usually written using kana alone  noun  noun (generic) 

• Mercenaria stimpsoni (species of Venus clam)

usually written using kana alone  noun  noun (generic) 

• Paphia euglypta (species of Venus clam)

usually written using kana alone  noun  noun (generic) 

• moon snail (Naticidae spp.), moon shell
• Marten's pearl oyster (Pinctada fucata martensii), Akoya pearl oyster

usually written using kana alone  noun  noun (generic) 

• Ezo neptune (species of whelk, Neptunea polycostata)

usually written using kana alone  noun  noun (generic) 

• Middendorf's whelk (Buccinum middendorffi)